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Am building a php site. we wants to introduce a payment gateway via any network.
...
We wants our users to pay certain amounts of money per months via any networks without going to the bank or using any online payment method.

This is self-contradictory.

Originally Posted by mutago

Is there any payment gateways API that works with any networks

What do you mean by "any networks"?

Originally Posted by mutago

I have written a login script that allow access for 30 days on any registered account. After 30 days, the account will expire
until user makes another payment via her network.

PayPal would be an ideal solution for this. You can set up subscriptions and recurring payments.

I mean a payment gateway api to collaborate with telecommunication companies,
they'll assign some certain short codes to me say 33570 and
when a consumer sends some certain commands in an sms,
some amount of credit would be deducted from their
account and their service fee would be paid.Then their accounts gets activated upon the payments.

It entirely depends on the telecommunication companies.
For us to help you, we'd need to have all of the information about the API. But even then, this is probably beyond the scope of the help we offer here-- we don't usually support specific third-party software or APIs, simply because it is rare that any of us have experience with them. We can help with code in general, but for a specific topic like that the best idea is to contact the companies that provide the APIs.

If you are building the entire system, then the easiest part will be working with an API. First you'll need to figure out things like how to send and receive SMS messages and how to deal with financial information. Honestly, if you don't know how to do this, I do not suggest that you try it-- working with financial information is very dangerous if you aren't sure what you're doing! It's best to hire an expert or start by doing a lot of research. Most of the time it's great to learn by trial and error. That is not true when money is involved.